[CentOS] unfsd scalability issues

Johnny Hughes

johnny at centos.org
Sat Jun 2 10:16:10 UTC 2012

On 06/01/2012 10:26 PM, Boris Epstein wrote:
> On Fri, Jun 1, 2012 at 6:36 PM, John R Pierce <pierce at hogranch.com> wrote:
>> On 06/01/12 2:27 PM, Boris Epstein wrote:
>>> I believe that unfsd (http://unfs3.sourceforge.net/  ) now does have
>>> multi-threaded capability and as such should be fairly well scalable. I
>> am
>>> using it on CentOS 6.2 and it seems to become all but unusable when more
>>> then 3-4 users connect to it. Is that normal? What sort of experience
>> have
>>> other people had?
>> yeesh, wtf ?
>>     latest version: 0.9.22    2009-01-05
>> WHY?!??!   what problem is this supposed to solve over the built in
>> native Linux NFS, which supports a lot more than just NFSv3?
>> maybe in 2003, when Linux NFS was sketchy, this made sense.
>> --
>> john r pierce                            N 37, W 122
>> santa cruz ca                         mid-left coast
>> John,
> The native NFS only supports the local file system (on the local disk).
> What we have here is an NFS gateway to a distributed file system, in our
> case MooseFS ( http://www.moosefs.org/ ).

You might take a look at GlusterFS for your distributed file system if
most of your nodes are on the same 100mbit or 1Gbit network.  GlusterFS
is the new "big thing" that Red Hat is going to support and we use it on
the CentOS infrastructure and like it quite well.  It is also very easy
to maintain and you can mount it via the glusterfs client or via NFS. 
It does not work real well across a slower internet like in multiple
datacenters, but if your machines are all on a fast network with each
other, I highly recommend it.


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